Surface gage.



Patented July 16, 1912.

A 7 I. 6 1 W 1 L B. FLINT.

SURFACE GAGE.

APPLICATION FILED OUT. 30, 1911.

COLUMBIA FLANOUBAPH COQWASHINOTON. D. C.

Witnesses. 9r 50? ZaWM QUM JOHN B. FLINT, 0F BOSTON, MASSACHUSETTS.

SURFACE-GAGE.

Specification of Letters Patent.

Patented July 16,1912.

Application filed October 30, 1911. Serial No. 657,552.

To all whom it may concern:

Be it known that I, JOHN B. FLINT, a citizen of the United States,residing at Boston, in the county of Suffolk and State of Massachusetts,have invented new and useful Improvements in Surface-Gages, of which thefollowing is a specification.

This invention relates to surface gages and has for its object toprovide a light and inexpensive gage which may be quickly adjusted toscribe parallel lines upon wood or metal surfaces which may be at anyangle to the base of said gage.

The object is further to provide a device adapted to be used as atry-square, a depth gage, or to measure the angle between two surfaces.

To these ends, the invention consists in the combination and arrangementof parts set forth in the following specification and particularlypointed out in the claims thereof.

Referring to the drawings: Figure 1 is a plan view of a surface gageembodying my invention, the same being broken away and shown in section.Fig. 2 is a side elevation of the same. Fig. 3 is a side elevation witha portion of the base broken away and having another form of markershown therein. Fig. t is an enlarged detail section taken on line k4 ofFig. 2.

In Figs. 2 and 3, surfaces to be described are indicated in broken anddotted lines.

Like numerals refer to like parts throughout the several views of thedrawings.

In the drawings, 5 is a base upon which are upwardly extending ears 6,6. Arocking member 7 is mounted between said ears upon a pivot 8supported in said ears and motion is imparted thereto in one directionby a torsional spring 9 located within a recess 10 formed in the side ofsaid rocking member and concentric with the pivot 8. One end 11 of saidspring engages the rocking member, while the other end 12 projectsdownwardly and engages the base 5, thereby tending to rock said memberin the direction of the arrow at, Fig. 2.

A thumb-screw 13 has screw-threaded engagement with the member 7 andbears upon the upper surface of the base 5 between the ears 6 and by therotation of said screw it will be readily seen that said member 7 willbe rocked upon its pivot 8 against or with the action of said spring,according to the direction of rotation of said screw.

The rocking member 7 is provided with a hole 14 extending longitudinallytherethrough transversely of the pivot 8 and at one side of the medianaxial line of said pivot. Another hole 15 is provided in said member 7extending transversely of the hole lt and also transversely of the pivot8, both said holes 14 and 15' being adapted to receive a marker 17 whichmay be secured in either of said holes by a screw 16.

In order that the relative angle between the median axial line of thepointer 17 and the bearing face 18 of the base 5 may be obtained, Ipreferably employ the following method. The extended face 19 of themember 7 has marked thereon radial lines 20, 2O converging to the axisof the rocking member 7 and representing degrees. A countersunk hole 21in the ear adjacent to the face 19 of said rocking member has upon itslower edge an index line 22 which registers with the lines on said face19, thereby indicating the relative angle of said parts.

In the general use of a gage of this character, different markers areemployed, according to the positions of the surfaces relatively to eachother, as, for instance, in Fig. 2 I have shown a marker 23 having oneof its ends tapered to a point and bent transversely of the median axialline of said pointer, and when said marker is placed in the hole 141:and clamped by the screw 16 it is adapted to mark upon a surfaceparallel to the bearing face 18 of the base 5. Again, if this same toolis placed in the hole 15, as shown in dotted lines, Fig. 2, it isadapted to mark a surface at right angles to said face 18, or by rockingthe member 7 upon its pivot 8 by means of the thumb-screw 13 and spring9, it will be readily seen that surfaces at any angle to each other maybe.

marked, the base 5 being recessed at 5 to allow a free movement of themarker while in the hole 15. For use in measuring the angle betweensurfaces, the end 24 of the pointer 23 is beveled to form a V-shapededge 25 which is placed against one of the surfaces to be measured,while the face 18 may be placed againstthe other of said surfaces by therotation of the thumb-screw 13, the result being indicated by the lines20, 20 registering with the index line 22; I/Vhen it is desired to usesaid gage as a depth gage, the marker 23 is placed in the hole 15, as indotted lines, Fig. 2, and the end 24 thereof moved up or down asdesired,

while as a try-square, said marker is also placed in the hole 15 withthe V-shaped edge pointing toward said base.

In Fig. 8, I have shown another form of marker 26 having an offsetportion 27 which is drilled at 28 to receive a lead or steel point 29. Aslot 30 is provided in the end 27 which allows the sides of the hole 28to be drawn together by a clamp 81 mounted thereon, said clampconsisting of a collar 32 and screw 33 having screw-threaded engagementwith said collar. It will be seen that by the rotation of said marker 26in the rocking member 7, the point of said marker will. be moved towardor from the face 18, thereby giving an adjustment independent of theadjustment provided by the rocking of the n'lember 7.

I-laving thus described my invention, 'wh at I claim and desire byLetters Patent to secure is:

1. A surface gage having, in combination a base, upwardly extending earsformed integral therewith, a pivot, a rocking member mounted on saidpivot between said ears and having a hole extending longitudinallytheretlufough transversely of said pivot and at one side of the medianaxial line thereof, a marker adjustably mounted within said hole andmeans to rock said rocking member.

2. A surface gage having, in combination, a base, upwardly extendingears formed integral therewith, a. pivot, a rocking member mounted onsaid pivot between said ears and having a hole extending longitudinallytheretln'ou gh transversely of said pivot and at one side oi. the medianaxial line thereof, said rocking member also having a hole extendingtransversely of said first-named hole and transversely of said pivot, amarker adapted to be adjustably mounted in either of said holes, andmeans to rock said rocking member.

3. A surface gage having, in combination, a base, upwardly extendingears formed in tegral therewith, a pivot, a rocking member mounted onsaid pivot between said ears and having a hole extending longitudinallytherethrough transversely of said pivot and at one side of the medianaxial line thereof, said rocking member also having a hole extendingtransversely of said first-named hole and transversely of said pivot, amarker adapted to be adjustably mounted in either of said holes andhaving one of its ends offset, whereby the position of the point at saidoliset end may be changed by the rotation of said marker within saidholes.

4. A surface gage having, in combination, a base having upwardlyextending ears, a rocking member pivoted between said ears, a torsionalspring located within a recess in said rocking member and concentricwith the pivot thereof, one end of said spring engaging said rockingmember and the other end of said spring engaging said base, whereby saidrocking member is rocked in. one direction, means to rock said rockingmember in the opposite direct-ion, and a marker adjustably connected. tosaid. rocking member.

A surface gage having, in combination, a base having upwardly extendingears, a rocking member pivoted between said cars, a torsional. springlocated within a recess in said rocking member and concentric with thepivot thereof, one end of said spring engaging said. rocking member and.the other end of said spring engaging said base, whereby said rockingmember is rocked in one direction, a thumbscrew having screw-threadedengagement with said rocking member, one end of said screw engaging saidbase, where by said member may be rocked in the opposite direction, anda marker adjustably connected to said rocking member.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOHN B. FLINT.

l Vitnesses SYDNEY E. Terr, ANNIE J. DAILEY.

- Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, D. G.

